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  * Copyright (c) 2013 GraphAware
  * This file is part of GraphAware.
  * GraphAware is free software: you can redistribute it and/or modify it under the terms of
  * the GNU General Public License as published by the Free Software Foundation, either
  * version 3 of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of
 * the GNU General Public License along with this program.  If not, see
 * <>.
package com.graphaware.tx.executor.single;
A specification of work to be executed within a transaction.

<T> type of what is returned in case of a successful TX execution.
public interface TransactionCallback<T> {

Perform the work. This method is guaranteed to run in the context of a transaction.

database on which to perform work and against which the transaction is running.
result of the transaction, can be null in case of a failure (or when no result is expected, in which case the generic type of the implementation should be java.lang.Void.
    T doInTransaction(final GraphDatabaseService databasethrows Exception;
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